One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,11)(4,8)(5,10)(6,9)(7,13)(12,16)(14,15)(17,18)(19,25)(20,35)(21,27)(22,28)(23,29)(24,30)(26,37)(31,42)(32,43)(33,45)(34,44)(36,47)(38,46)(39,41)(40,48) involution — undirected(1,3)(2,7)(4,12)(5,14)(6,13)(8,15)(9,11)(10,16)(17,19,24,34)(18,25,30,44)(20,36,32,39)(21,31,23,33)(22,38,40,37)(26,28,46,48)(27,42,29,45)(35,47,43,41)(1,4,6,5)(2,8,9,10)(3,12,13,14)(7,15,11,16)(17,20)(18,26)(19,22)(21,37)(23,38)(24,32)(25,41)(27,43)(28,45)(29,35)(30,46)(31,39)(33,36)(34,40)(42,48)(44,47)(2,9)(7,11)(8,10)(15,16)(17,21,24,23)(18,27,30,29)(19,31,34,33)(20,37,32,38)(22,39,40,36)(25,42,44,45)(26,43,46,35)(28,41,48,47)(1,5,6,4)(2,10,9,8)(3,12,13,14)(7,15,11,16)(17,22,24,40)(18,28,30,48)(19,32,34,20)(21,36,23,39)(25,43,44,35)(26,45,46,42)(27,47,29,41)(31,37,33,38)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.